CN105874868B - A kind of cell Node, uplink interference processing system and method - Google Patents

A kind of cell Node, uplink interference processing system and method Download PDF

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Publication number
CN105874868B
CN105874868B CN201480000309.9A CN201480000309A CN105874868B CN 105874868 B CN105874868 B CN 105874868B CN 201480000309 A CN201480000309 A CN 201480000309A CN 105874868 B CN105874868 B CN 105874868B
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uplink
cell node
configuration
interference
interference cancellation
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CN105874868A (en
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徐小英
马雪利
张鹏
郑潇潇
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Heze Shuanglong Metallurg Machinery Co ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/27—Control channels or signalling for resource management between access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the present invention provides a kind of cell Node, uplink interference processing system and method.Microcell node of the invention includes: receiving module (11), request is eliminated in interference for receiving the transmission of macrocell node, the uplink configuration information that user equipment (UE) is included at least in request is eliminated in interference, and the uplink configuration information of UE includes uplink pressing mold configuration information or the gain factor for calculating auxiliary Dedicated Physical Control Channel (S-DPCCH)；Receiving module (11), is also used to receive the configuration notification message of macrocell node transmission, and configuration notification message is used to indicate the uplink configuration mode of UE；It interferes processing module (12), carries out interference elimination for eliminating request and notification module configuration notification message according to the received interference of receiving module (11).The embodiment of the present invention solves the prior art to the cancellation of interference signal in heterogeneous network (Hetnet), and the problem for causing practicability lower due to only considering the conventional scenario of UE uplink configuration improves the application range of the embodiment of the present invention.

Description

Cell node, uplink interference processing system and method
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a cell node, an uplink interference processing system, and a method thereof.
Background
The wireless communication field faces the pressure of data service explosion growth, and in order to improve Network capacity and reduce transmission cost, a Heterogeneous Network (Hetnet) technology is proposed in the industry. Hetnet is formed by a plurality of different sized, different types of cells together, and may include, for example: macro cells (Macro cells) and micro cells. Wherein the micro cell comprises: a Micro Cell (Micro Cell), a Pico Cell (Pico Cell), a femto Cell (femto Cell), a Remote Radio Head (RRH) type Cell, and the like. By deploying the macro cell and the micro cell, the network capacity of a traffic-intensive area can be effectively improved, and the micro cell has a small scale, so that both the construction cost (referred to as "Capax") and the operation cost (referred to as "Opex") are low, and therefore, the Hetnet is valued by many operators and is widely used in the construction of a wireless network.
In a network of Hetnet, after a User Equipment (UE) establishes a connection with a macro cell, normal uplink signal transmission is performed. In the implementation process of the Hetnet network, when the UE accessing the macro cell enters the uplink coverage area of the micro cell but does not establish connection with the micro cell, the micro cell may receive an uplink signal transmitted by the macro cell UE because the macro cell UE is in the uplink coverage area of the micro cell, and thus, interference may be caused to the micro cell. Therefore, eliminating interference caused by the uplink signal of the macro cell UE becomes an important way to increase network capacity in the Hetnet.
However, at present, only the conventional scenario of UE uplink configuration, for example, the scenario of UE configuring an uplink Dedicated Physical Control Channel (DPCCH) or an uplink Enhanced Dedicated Physical Control Channel (E-DPCCH), is usually considered for the interference signal cancellation method in Hetnet, which results in a low practicality and a small applicable range of the interference cancellation method in the prior art.
Disclosure of Invention
Embodiments of the present invention provide a cell node, an uplink interference processing system, and a method, so as to solve a problem in the prior art that a method for eliminating an interference signal in a Hetnet is low in practicability due to only considering a conventional scenario of UE uplink configuration.
In a first aspect, an embodiment of the present invention provides a micro cell node, including:
a receiving module, configured to receive an interference cancellation request sent by a macro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink configuration information or a gain factor used for calculating a secondary dedicated physical control channel S-DPCCH, and at least one of: the uplink scrambling code information of the UE, the time slot format information of the uplink DPCCH of the UE, and the configuration information used for determining the position information of the uplink dedicated physical control channel DPCCH of the UE and the enhanced dedicated physical control channel E-DPCCH;
the receiving module is further configured to receive a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE;
and an interference processing module, configured to perform interference cancellation according to the interference cancellation request and the configuration notification message received by the receiving module.
In a first possible implementation manner of the first aspect, the interference processing module includes:
a detecting unit, configured to detect an uplink signal of the UE corresponding to the interference cancellation request according to uplink configuration information of the UE included in the interference cancellation request received by the receiving module;
a cancellation unit, configured to cancel, in the received uplink signal, the uplink signal of the UE detected by the detection unit according to the uplink configuration manner indicated by the configuration notification message received by the receiving module.
According to the first aspect or the first possible implementation manner of the first aspect, in a second possible implementation manner, the configuration notification message received by the receiving module indicates that the uplink configuration method of the UE includes uplink stamper configuration;
the interference processing module is specifically configured to determine a transmission timeslot of an uplink signal of the UE according to the uplink stamper configuration information received by the receiving module and the uplink stamper configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the sending time slot.
In a third possible implementation manner, the configuration notification message received by the notification module indicates that the uplink configuration method of the UE includes uplink multiple-input multiple-output MIMO or uplink closed-loop transmit diversity CLTD configuration;
the interference processing module is specifically configured to demodulate a signal of the uplink S-DPCCH of the UE according to the gain factor received by the receiving module and used for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, so as to obtain an uplink signal of the UE; and eliminating the uplink signal of the UE in the received uplink signal.
According to the first aspect and any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner, the micro cell node further includes: a sending module, configured to send an interference cancellation instruction to a macro cell node before the receiving module receives an interference cancellation request sent by the macro cell node, so that the macro cell node sends the interference cancellation request to the micro cell node according to the interference cancellation instruction; or,
the sending module is configured to send the uplink interference degree of the microcell to the macrocell node before the receiving module receives the interference cancellation request sent by the macrocell node, so that the macrocell node sends the interference cancellation request to the microcell node when detecting that the uplink interference degree is higher than a predefined threshold.
In a second aspect, an embodiment of the present invention provides a macro cell node, including:
a sending module, configured to send an interference cancellation request to a micro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating a secondary dedicated physical control channel S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH;
the sending module is further configured to send a configuration notification message to a micro cell node, so that the micro cell node performs interference cancellation according to the interference cancellation request and the configuration notification message, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
In a first possible implementation manner of the second aspect, the sending module includes:
a determining unit, configured to determine a UE causing uplink interference to a pico cell;
a sending unit, configured to send, to the micro cell node, an interference cancellation request including the uplink configuration information of the UE indicated by the determination result obtained by the determining unit.
According to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner, when the UE of the macro cell is in uplink configuration, the uplink configuration information of the UE sent by the sending module specifically includes the uplink configuration information;
the uplink configuration method of the UE is indicated by the configuration notification message sent by the sending module to the micro cell node, wherein the configuration notification message includes uplink die configuration, so that the micro cell node determines the sending time slot of the uplink signal of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot.
In a third possible implementation manner, when the UE of the macro cell is in uplink MIMO or CLTD configuration, the uplink configuration information of the UE sent by the sending module specifically includes the gain factor for calculating the S-DPCCH;
the sending module indicates that the uplink configuration method of the UE comprises uplink MIMO or uplink CLTD configuration to a micro cell node, so that the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the gain factor for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, and thus an uplink signal of the UE is obtained; and eliminating the uplink signal of the UE in the received uplink signal.
According to the second aspect and any one of the first to third possible implementation manners of the second aspect, in a fourth possible implementation manner, the macro cell node further includes: a receiving module, configured to receive an interference cancellation indication sent by a micro cell node before a sending module sends an interference cancellation request to the micro cell node;
the sending module is specifically configured to send an interference cancellation request to the micro cell node according to the interference cancellation indication received by the receiving module; or,
the receiving module is configured to receive the uplink interference degree of the micro cell sent by the micro cell node before the sending module sends the interference cancellation request to the micro cell node;
the sending module is specifically configured to send an interference cancellation request to the femtocell node when detecting that the uplink interference degree received by the receiving module is higher than a predefined threshold.
In a third aspect, an embodiment of the present invention provides an uplink interference processing system, including: micro cell nodes and macro cell nodes;
the macro cell node is configured to send an interference cancellation request to a micro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink compression mode configuration information or a gain factor used for calculating a secondary dedicated physical control channel S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH; sending a configuration notification message to the micro cell node, wherein the configuration notification message is used for indicating an uplink configuration mode of the UE;
the micro cell node is configured to receive the interference cancellation request and the configuration notification message sent by the macro cell node;
the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message.
In a first possible implementation manner of the third aspect, the sending, by the macro cell node, an interference cancellation request to a micro cell node specifically includes:
determining UE causing uplink interference to a micro cell;
and sending an interference elimination request comprising the uplink configuration information of the UE indicated by the determination result to the micro cell node.
According to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes:
detecting an uplink signal of the UE corresponding to the interference elimination request according to the uplink configuration information of the UE contained in the interference elimination request;
and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message.
According to the third aspect, the first or second possible implementation manner of the third aspect, in a third possible implementation manner, when the UE of the macro cell is in uplink configuration, the uplink configuration information of the UE specifically includes the uplink configuration information; the configuration notification message sent by the macro cell node to the micro cell node indicates that the uplink configuration method of the UE comprises uplink compression mode configuration;
the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes:
the uplink die configuration information is used for indicating uplink die configuration of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the sending time slot.
According to the third aspect, the first or second possible implementation manner of the third aspect, in a fourth possible implementation manner, when the UE of the macro cell is in an uplink multiple-input multiple-output MIMO or uplink closed loop transmit diversity CLTD configuration, the uplink configuration information of the UE specifically includes the gain factor used for calculating the S-DPCCH; the configuration notification message sent by the macro cell node to the micro cell node indicates that the uplink configuration method of the UE comprises uplink MIMO or uplink CLTD configuration;
the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes:
the uplink signal acquisition unit is used for demodulating the signal of the uplink S-DPCCH of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor for calculating the S-DPCCH, so as to acquire the uplink signal of the UE; and eliminating the uplink signal of the UE in the received uplink signal.
In a fifth possible implementation manner, the micro-cell node is further configured to send an interference cancellation indication to the macro-cell node before receiving the interference cancellation request sent by the macro-cell node;
the macro cell node is configured to send an interference cancellation request to the micro cell node, and specifically includes: the micro cell node is used for sending an interference elimination request to the micro cell node according to the interference elimination indication; or,
the micro cell node is further configured to send an uplink interference degree of the micro cell to the macro cell node before receiving the interference cancellation request sent by the macro cell node;
the macro cell node is configured to send an interference cancellation request to the micro cell node, and specifically includes: and the base station is used for sending an interference elimination request to the micro cell node when the uplink interference degree is detected to be higher than a predefined threshold.
In a fourth aspect, an embodiment of the present invention provides an uplink interference processing method, including:
the method comprises the following steps that a micro cell node receives an interference elimination request sent by a macro cell node, wherein the interference elimination request comprises uplink configuration information of User Equipment (UE), the uplink configuration information of the UE comprises uplink compression mold configuration information or a gain factor used for calculating an auxiliary dedicated physical control channel (S-DPCCH), and at least one of the following steps: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH;
receiving a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE;
and carrying out interference elimination according to the interference elimination request and the configuration notification message.
In a first possible implementation manner of the fourth aspect, the performing interference cancellation according to the interference cancellation request and the configuration notification message includes:
detecting an uplink signal of the UE corresponding to the interference elimination request according to the uplink configuration information of the UE contained in the interference elimination request;
and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message.
According to the fourth aspect or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the configuration notification message indicates that the uplink configuration method of the UE includes uplink stamper configuration;
the performing interference cancellation according to the interference cancellation request and the configuration notification message includes:
determining a sending time slot of an uplink signal of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message;
and eliminating the uplink signal of the UE in the received uplink signal according to the sending time slot.
In a third possible implementation manner, the configuration notification message indicates that the uplink configuration method of the UE includes uplink multiple-input multiple-output MIMO or uplink closed-loop transmit diversity CLTD configuration;
the performing interference cancellation according to the interference cancellation request and the configuration notification message includes:
demodulating the uplink S-DPCCH signal of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor for calculating the S-DPCCH, thereby acquiring the uplink signal of the UE;
and eliminating the uplink signal of the UE in the received uplink signal.
According to the fourth aspect and any one of the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner, before the receiving, by the micro cell node, an interference cancellation request sent by a macro cell node, the method further includes:
sending an interference elimination instruction to the macro cell node so that the macro cell node sends an interference elimination request to the micro cell node according to the interference elimination instruction; or,
and sending the uplink interference degree of the micro cell to the macro cell node, so that the macro cell node sends an interference elimination request to the micro cell node when detecting that the uplink interference degree is higher than a predefined threshold.
In a fifth aspect, an embodiment of the present invention provides an uplink interference processing method, including:
a macro cell node sends an interference elimination request to a micro cell node, wherein the interference elimination request comprises uplink configuration information of User Equipment (UE), the uplink configuration information of the UE comprises uplink compression mold configuration information or a gain factor used for calculating a secondary dedicated physical control channel (S-DPCCH), and at least one of the following: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH;
and sending a configuration notification message to a micro cell node to enable the micro cell node to perform interference cancellation according to the interference cancellation request and the configuration notification message, wherein the configuration notification message is used for indicating an uplink configuration mode of the UE.
In a first possible implementation manner of the fifth aspect, the sending, by the macrocell node, an interference cancellation request to the microcell node includes:
determining UE causing uplink interference to a micro cell;
and sending an interference elimination request comprising the uplink configuration information of the UE indicated by the determination result to the micro cell node.
According to the fifth aspect or the first possible implementation manner of the fifth aspect, in a second possible implementation manner, when the UE of the macro cell is in uplink configuration, the uplink configuration information of the UE specifically includes the uplink configuration information;
the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink stamper configuration, so that the micro cell node determines a sending time slot of an uplink signal of the UE according to the uplink stamper configuration information and the uplink stamper configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot.
In a third possible implementation manner, when the UE of the macro cell is in uplink MIMO or CLTD configuration, the uplink configuration information of the UE specifically includes the gain factor for calculating the S-DPCCH;
the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE comprises uplink MIMO or uplink CLTD configuration, so that the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the gain factor for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, and thus an uplink signal of the UE is obtained; and eliminating the uplink signal of the UE in the received uplink signal.
In a fourth possible implementation manner, before the sending, by the macrocell node, the interference cancellation request to the microcell node, according to the fifth aspect or any one of the first to third possible implementation manners of the fifth aspect, the method further includes:
receiving an interference elimination indication sent by the micro cell node;
the macro cell node sends an interference cancellation request to the micro cell node, including:
the macro cell node sends an interference elimination request to the micro cell node according to the interference elimination indication; or,
before the macro cell node sends an interference cancellation request to the micro cell node, the method further includes:
receiving the uplink interference degree of the micro cell sent by the micro cell node;
the macro cell node sends an interference cancellation request to the micro cell node, including:
and the macro cell node sends an interference elimination request to the micro cell node when detecting that the uplink interference degree is higher than a predefined threshold.
The embodiment of the invention provides a cell node, an uplink interference processing system and a method, wherein the micro-cell node eliminates an uplink signal of UE (user equipment) of a micro cell in a received signal according to an interference elimination request and a configuration notification message sent by a received macro-cell node generating an interference signal, and the uplink signal of the UE is eliminated in the received signal according to uplink configuration information of the UE generating the interference signal to the micro cell and an uplink configuration mode of the UE indicated by the configuration notification message, so that when the uplink channel of the UE of the macro cell is configured in different scenes, the interference signal generated by the UE of the macro-cell can be eliminated by the cell node, and particularly when the UE of the macro cell is configured in an uplink compression mode, an uplink MIMO (multiple input multiple output) configuration or an uplink CLTD (common critical time division) configuration, the problem that the elimination mode of the interference signal in Hetnet in the prior art is solved, and the practicability is low due to the consideration of the conventional scene of the uplink configuration of, the uplink interference signal elimination can be realized in more application scenes, and the application scenes are wide.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a Hetnet scenario;
fig. 2 is a schematic structural diagram of a micro cell node according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of UE transmitting uplink signals in uplink MIMO or uplink CLTD scenarios;
fig. 4 is a schematic structural diagram of another micro cell node according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a macro cell node according to a second embodiment of the present invention;
fig. 6 is a schematic structural diagram of another macro cell node according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a micro cell node according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of a macro cell node according to a fourth embodiment of the present invention;
fig. 9 is a schematic structural diagram of an uplink interference processing system according to an embodiment of the present invention;
fig. 10 is a flowchart of an uplink interference processing method according to a fifth embodiment of the present invention;
fig. 11 is a flowchart of an uplink interference processing method according to a sixth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The techniques described herein may be used in various communication systems, such as current 3G communication systems and next generation communication systems, such as Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, FDMA systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, FDMA systems, General Packet Radio Service (GPRS) systems, Long Term Evolution (Long Term Evolution) systems, and other such communication systems. Especially in the scenario of micro cell base stations deployed in these wireless network systems.
Various aspects are described herein in connection with a UE and/or a Base Station (BS) and/or a Base Station controller.
A UE may be a wireless terminal, which may be a wired terminal or a wireless terminal, which may be a device providing voice and/or data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (e.g., RAN). Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), an Access Point (Access Point), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User agent (User agent), a User Device (User Device), or a User Equipment (User Equipment).
A BS, i.e., a node, may refer to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The BS may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal and the rest of the access network, which may encompass the IP network. The BS may also coordinate the management of attributes for the air interface. For example, the BS may be a base Station in CDMA (BTS), a base Station in WCDMA (NodeB), or an evolved Node B in LTE (eNB or e-NodeB), and the present invention is not limited thereto.
The Base Station Controller, i.e. the control node, may be, for example, a Base Station Controller (BSC) in CDMA, or may also be a Radio Network Controller (RNC) in WCDMA, it should be noted that, in LTE, the eNB integrates part of the Base Station control functions, and the present invention is not limited thereto.
Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
As shown in fig. 1, the network deployment method of Hetnet includes a macro cell and a micro cell, which have their respective functions. In the network deployment mode, the micro cell node (20a) and the macro cell node (10b) can respectively establish connection with the UE entering the cell managed by the micro cell node and the macro cell node, for example, the UE (10a) can perform normal uplink signal transmission after establishing connection with the macro cell node (10 b). In the Hetnet network shown in fig. 1, the micro-cell node (20a) can receive the uplink signal of the UE (10a) in the macro cell, however, the uplink signal of the macro cell UE (10a) is an interference signal for the micro-cell node (20a), so that for the micro-cell node (20a), eliminating the received uplink signal of the macro cell UE (10a) becomes an important way to improve the network capacity; in order to eliminate uplink interference caused by the macro cell UE (10a) to the micro cell node (20a), the embodiment of the present invention specifically describes a specific uplink interference elimination manner.
Example one
Fig. 2 is a schematic structural diagram of a micro cell node according to an embodiment of the present invention. The micro-cell node of the embodiment is suitable for the situation of interference elimination in the Hetnet network. The micro cell node may be implemented in hardware and software and may be integrated into a memory of the micro cell node, such as a processor chip, for execution by a processor call. The micro cell node provided in this embodiment specifically includes: a receiving module 11 and an interference processing module 12.
The receiving module 11 is configured to receive an interference cancellation request sent by a macro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink compression mode configuration information or a gain factor used for calculating a Secondary-dedicated physical control channel (Secondary-DPCCH, abbreviated as S-DPCCH), and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink DPCCH of the UE and the configuration information of the E-DPCCH.
In this embodiment, the UE establishes a connection with the macro cell node, and the UE enters the uplink coverage of the micro cell node, but the UE does not establish a connection with the micro cell node, that is, the UEs described in the embodiments of the present invention are all macro cell UEs, that is, UEs that establish a connection with the macro cell. Because the micro cell node can receive the uplink signal of the macro cell UE, and the uplink signal of the macro cell UE is an interference signal for the micro cell, the uplink signal of the macro cell UE can be eliminated from the signal received by the receiving module through the micro cell node provided by the present invention; generally, the uplink configuration information of the macro cell UE may include: the uplink scrambling code information of the UE, the time slot format information of the uplink DPCCH of the UE, and the configuration information of the position information and the E-DPCCH of the uplink DPCCH of the UE are determined; wherein, the location information for determining the uplink DPCCH of the UE comprises at least one of: the timing difference between an uplink DPCCH of the UE and a common pilot channel of the microcell and the timing difference between a downlink DPCCH of the UE and the common pilot channel of the microcell are obtained; in this embodiment, taking the RNC as a base station controller in the Hetnet as an example for explanation, generally, the RNC notifies the micro cell node of specific content of the uplink configuration information of the macro cell UE, and the micro cell node performs interference cancellation on the received signal according to the information, specifically, cancels the uplink signal of the macro cell UE.
It should be noted that, the uplink configuration information included in the uplink configuration information of the macro cell UE received by the micro cell node provided in this embodiment may perform cancellation processing on an uplink signal generated by the macro cell UE in uplink configuration; the gain factor used for calculating the S-DPCCH may be used to perform cancellation processing on an uplink signal generated by the macro cell UE in an uplink Multiple Input Multiple Output (MIMO) configuration or an uplink Closed Loop Transmit Diversity (CLTD) configuration. For the macro cell UE in the specific scenario, since the micro cell node provided in this embodiment can eliminate the uplink interference signal information generated by the micro cell node, and reduce the uplink interference signal in the Hetnet network, the capacity of the Hetnet network is improved compared with the prior art.
The micro-cell node may also cancel an uplink signal generated when the macro-cell UE is in a conventional scenario, for example, when the uplink configuration information received by the micro-cell node includes at least one of information such as a slot format, a frame offset, a slot offset, and the maximum number of uplink DPDCHs, the interference cancellation may be performed on the macro-cell UE configured on the DPCCH; for another example, when the uplink configuration information received by the micro cell node includes at least one of the information of the largest E-DPCCH Set, the puncturing restriction, the Enhanced-Transport Format Combination Set (abbreviated as E-TFCS), the information of the Enhanced uplink transmission time interval, and the power offset information of the E-DPCCH, interference cancellation may be performed on the macro cell UE configured under the E-DPCCH; generally, the uplink configuration information may further include other configuration information, such as discontinuous transmission configuration information, which plays an auxiliary role when the micro cell node performs interference cancellation; the micro cell node provided by the embodiment can perform interference elimination on uplink signals generated by macro cell UE in different application scenes, so that interference signals in a network are reduced, and the capacity of the Hetnet network is correspondingly improved.
The receiving module 11 is further configured to receive a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
In this embodiment, since the receiving module 11 receives the uplink configuration information for eliminating the uplink signal of the macro cell UE in the uplink compression mode configuration, or the uplink MIMO or uplink CLTD configuration, for the macro cell, the uplink transmission mode of the UE that generates interference to the micro cell in the cell is known, that is, the uplink configuration mode of the UE is known, so that the macro cell may also notify the uplink configuration mode of the UE to the micro cell node to be interference eliminated.
An interference processing module 12, configured to perform interference cancellation according to the interference cancellation request and the configuration notification message received by the receiving module 11.
In this embodiment, the UE uplink configuration information included in the received uplink configuration information and used for performing interference cancellation on an uplink signal of a macro cell UE in uplink compression mode configuration, or uplink MIMO or uplink CLTD configuration corresponds to the uplink configuration mode of the UE indicated by the configuration notification message received by the receiving module 11; for example, when the configuration notification message received by the receiving module 11 indicates that the uplink configuration method of the UE includes uplink stamper configuration; correspondingly, the interference processing module 12 is specifically configured to determine a transmission timeslot of an uplink signal of the UE according to the uplink stamper configuration information received by the receiving module 11 and the uplink stamper configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the transmission time slot. Generally, a signal is transmitted by a method of transmitting a data frame, a UE in uplink compression mode configuration processes a data signal, for example, compresses data in 10s to 5s for transmission, that is, the UE does not transmit a data signal for a certain period of time in a fixed time slot, a micro cell node learns the method of transmitting an uplink signal by the UE by receiving a configuration notification message, and further demodulates and cancels the uplink signal transmitted by the UE in the received signal according to the time slot of transmitting the uplink signal by the UE, and specifically, the method of performing interference cancellation in the prior art, for example, signal reconstruction and signal cancellation, which is not particularly limited in the embodiment of the present invention.
The uplink stamper configuration information in this embodiment may generally include: information on one or more parameters of a start time slot number of the stamper, a length of the transmission space, a length of the stamper pattern, and the number of times of transmission of the stamper pattern.
For another example, when the configuration notification message received by the receiving module 11 indicates that the uplink configuration method of the UE includes uplink MIMO or uplink CLTD configuration; accordingly, the interference processing module 12 is specifically configured to demodulate a signal of the uplink S-DPCCH of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor for calculating the S-DPCCH received by the receiving module 11, so as to obtain an uplink signal of the UE; and eliminates the uplink signal of the UE in the received uplink signal. Fig. 3 is a schematic diagram of UE transmitting uplink signals in uplink MIMO or uplink CLTD scenarios, as shown in fig. 3, data transmitted by the UE through DPCCH and S-DPCCH reach a receiving end through two signals, and two antennas of the receiving end receive the data transmitted through each channel; specifically, r1 and r2 are powers of uplink DPCCH or S-DPCCH received by the micro-cell node, and the DPCCH reaches the micro-cell node through a channel matrix H1 ═ H1V1+ H2V2The received power of the signal received by the node is r1, the micro cell node determines H1 according to the received power r1 and the power of the transmitting end, in addition, the S-DPCCH passes through a channel matrix H2-H1V 3+ H2V4, the received power of the signal received by the micro cell node is r2, and the micro cell node determines H2 according to the received power r2 and the power of the transmitting end; wherein beta iscIs the transmit power of the DPCCH, betascIs a gain factor of the S-DPCCH relative to the DPCCH, and the micro-cell node demodulates an uplink signal of a transmitting end, i.e., the macro-cell UE, according to the determined H1, H2 and the received signal, where the uplink signal is transmitted through the DPCCH and the S-DPCCH, and typically, the uplink DPCCH may include at least one of E-DPCCH, S-E-DPCCH, E-DPDCH, and High-Speed dedicated physical control channel (High-Speed DPCCH, abbreviated as HS-DPCCH), and the uplink S-DPCCH may include S-DPCCH or/and Secondary Enhanced dedicated physical control channel (Secondary Enhanced DPCCH, abbreviated as S-E-DPCCH); that is, in this embodiment, the RNC sends the gain factor of the UE for calculating the S-DPCCH to the micro cell node, and demodulates the uplink signal sent through the S-SPCCH according to the parameters used to calculate the channel matrix, so as to obtain a manner in which the macro cell UE sends the uplink signal, and then the micro cell node may cancel the demodulated uplink signal, that is, the uplink signal of the macro cell UE, where the interference cancellation may specifically adopt a manner of performing interference cancellation in the prior art, such as signal reconstruction and signal cancellation, which is not particularly limited in this embodiment of the present invention.
The micro-cell node provided by the embodiment of the invention eliminates the uplink signal of the macro-cell UE in the received signal according to the uplink configuration information of the UE generating the interference signal to the micro-cell and the uplink configuration mode of the UE indicated by the configuration notification message, which are contained in the interference elimination request, by the received interference elimination request and the configuration notification message sent by the macro-cell node generating the interference signal, so that the micro-cell node can eliminate the interference signal generated by the macro-cell UE when the uplink channel of the macro-cell UE is configured in different scenes, and particularly solves the problem of low practicability caused by only considering the conventional scene of the uplink configuration of the UE when the macro-cell UE is configured in an uplink compression mode, an uplink MIMO configuration or an uplink CLTD configuration, and can realize the elimination of the uplink interference signal in more application scenes, the application scene is wide.
In a specific implementation, the uplink configuration information of the UE described in this embodiment may further include other optional configuration information, where the optional configuration information may generally include one or more of the optional configuration information, and when interference cancellation is performed on an interference signal generated by the macro cell UE, the more contents are included in the transmitted uplink configuration information, the more accurate the result of demodulating the interference information is, which is beneficial to improving the effect of interference cancellation; optional parameters of the configuration information and specific meanings of the parameters can be referred to the following table 1:
TABLE 1
Further, fig. 4 is a schematic structural diagram of another micro cell node provided in the embodiment of the present invention, and on the basis of fig. 2, in the micro cell node provided in this embodiment, the interference processing module 12 may include: a detecting unit 13, configured to detect, according to uplink configuration information of the UE included in the interference cancellation request received by the receiving module 11, an uplink signal of the UE corresponding to the interference cancellation request; a removing unit 14, configured to remove the uplink signal of the UE detected by the detecting unit 13 from the received uplink signal according to the uplink configuration manner indicated by the configuration notification message received by the receiving module 11.
The interference elimination request may be a connected UE of the macro cell node, and the interference elimination request includes uplink configuration information of the macro cell UE accessed to the macro cell node, and the micro cell node may detect the corresponding UE according to the information and eliminate the detected uplink signal of the macro cell UE.
Or, the interference cancellation request may correspond to a macro cell UE causing uplink interference to the micro cell, where the interference cancellation request only includes uplink configuration information of the macro cell UE causing uplink interference to the micro cell, and the micro cell node may specifically detect the corresponding UE according to the configuration information and cancel the detected uplink signal of the macro cell UE.
In another implementation manner of the embodiment of the present invention, since the workload of the micro cell node for detecting and eliminating all the macro cell UEs is large, in order to reduce the workload of the micro cell node, the range of the macro cell UE to be detected by the micro cell node may be reduced. Therefore, the UE corresponding to the interference cancellation request may also be a UE that causes uplink interference to the micro cell and is determined by the macro cell node.
Optionally, in this embodiment, the macro cell node may actively send the interference cancellation request, or the micro cell node may trigger the micro cell node to initiate the interference cancellation request. Specifically, the micro cell node provided by this embodiment further includes: a sending module 15, configured to send an interference cancellation instruction to the macrocell node before the receiving module 11 receives the interference cancellation request sent by the macrocell node, so that the macrocell node sends the interference cancellation request to the microcell node according to the interference cancellation instruction; alternatively, the sending module 15 is configured to send, to the macrocell node, an uplink Interference level of the microcell before the receiving module 11 receives the Interference cancellation request sent by the macrocell node, where the uplink Interference level may be characterized by, for example, a Signal-to-Interference ratio (Signal-to-Interference ratio, abbreviated as SIR), a Signal-to-Noise ratio (Signal-to-Noise ratio, abbreviated as SNR), or a Signal-to-Interference-and-Noise ratio (Signal-to-Interference and Noise ratio, abbreviated as SINR) of a received Signal, so that the macrocell node sends the Interference cancellation request to the microcell node when detecting that the uplink Interference level is higher than a predefined threshold; if the uplink interference degree does not exceed the predefined threshold, an interference elimination request does not need to be sent, so that the interference elimination load of the micro cell node is reduced when the interference degree is low, and the power consumption is reduced.
The indication message or the uplink interference degree sent by the micro cell node to the macro cell node through the sending module 15 is a condition for triggering the macro cell node to send an interference cancellation request; the interference cancellation indication may also be sent periodically by the micro cell node to reduce uplink interference of the micro cell. Specifically, the interference cancellation indication is an explicit indication, and requires the macrocell node to send an interference cancellation request; the uplink interference degree sent by the micro cell node is an implicit indication, and the macro cell node sends an interference elimination request to the micro cell node according to whether the uplink interference degree received by the micro cell is higher than a predefined threshold or not as a trigger condition; the uplink interference degree suffered by the micro cell can be determined by the uplink interference caused by the macro cell UE, or by the uplink interference caused by the connected UE of the macro cell received by the micro cell.
In the micro cell node provided in this embodiment, the sending module 15 is further configured to send, before the receiving module 11 receives the interference cancellation request sent by the macro cell node, capability information of interference cancellation to the macro cell node, so that the macro cell node sends the interference cancellation request to the micro cell node according to the capability information of interference cancellation.
In this embodiment, the micro-cell node may report the capability information that it supports or does not support interference cancellation to the macro-cell node, so that if the micro-cell node does not have the capability of interference cancellation, the macro-cell node does not need to send an interference cancellation request to the micro-cell node. For example, the case where the micro cell node does not support interference cancellation may be: the micro cell node may not have the capability of eliminating the uplink signal of the macro cell UE from the received uplink signal due to different device performances, or the micro cell node may run overload due to the interference elimination operation already performed, and the like.
Further, in the micro cell node provided in this embodiment, the sending module 15 is further configured to send an interference cancellation response to the macro cell node after the receiving module 11 receives the interference cancellation request sent by the macro cell node, so that the macro cell node performs an operation of further cancelling interference according to the interference cancellation response.
In this embodiment, the interference cancellation response may indicate that the macro cell node has received the interference cancellation request, indicate that an interference cancellation operation is in progress, indicate that interference cancellation is completed, indicate that a UE corresponding to the interference cancellation request is not detected, indicate that the micro cell has no capability of performing interference cancellation, or indicate that interference cancellation is overloaded, or the like; causing the macro cell node to perform further operations according to the specific content indicated by the interference cancellation response, for example, if the interference cancellation response indicates that an interference cancellation request has been received, the macro cell node may not repeatedly send the interference cancellation request; if the interference cancellation response indicates that the micro cell node does not have the interference cancellation capability, and does not detect that the UE corresponding to the interference cancellation request or the interference cancellation is overloaded, the macro cell node may continue to perform an operation of further reducing the interference. For example, UE causing uplink interference to the micro cell is switched to another frequency point, or time division resources occupied by macro cell UE and micro cell UE are isolated by time division scheduling, or uplink transmission power of macro cell UE is reduced.
It should be noted that the embodiment of the present invention may be applied to various Hetnet architectures, including a scenario in which a macro cell node and a micro cell node belong to the same control node, and also including a scenario in which the macro cell node and the micro cell node do not belong to the same control node. For example, the control node to which the microcell node belongs is a BS gateway, and the control node to which the macrocell node belongs is a scenario of a macrocell RNC. Similarly, the embodiments of the present invention may also be applied to other Hetnet architectures, and this embodiment is not illustrated in any way.
According to the micro-cell node provided by the embodiment of the invention, the uplink signal of the UE generating the interference signal in the received signal is eliminated in the received signal according to the uplink configuration information of the UE generating the interference signal to the micro-cell and the uplink configuration mode of the UE indicated by the configuration notification message, which are contained in the interference elimination request, through the received interference elimination request and the configuration notification message sent by the macro-cell node generating the interference signal, so that the micro-cell node can eliminate the interference signal generated by the macro-cell UE when the uplink channel of the macro-cell UE is configured in different scenes, and especially can eliminate the uplink interference signal when the macro-cell UE is configured in uplink compression molding, uplink MIMO or uplink CLTD. In addition, in this embodiment, a UE causing uplink interference to the micro cell is determined in advance, and the range of the macro cell UE that needs to perform interference cancellation is narrowed, so that not only is the amount of information included in the interference cancellation request reduced, but also the interference cancellation load of the micro cell node is reduced.
Example two
Fig. 5 is a schematic structural diagram of a macro cell node according to a second embodiment of the present invention. The macro cell node in this embodiment is suitable for performing interference cancellation in the Hetnet network. The macrocell node is typically implemented in hardware and software and may be integrated into a memory of the macrocell node, for example, into a processor chip for execution by a processor call. The macro cell node provided in this embodiment specifically includes: a sending module 21.
The sending module 21 is configured to send an interference cancellation request to the micro cell node, where the interference cancellation request includes uplink configuration information of the UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating an S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink DPCCH of the UE and the configuration information of the E-DPCCH.
In this embodiment, as the same application scenario as that of the foregoing embodiment, it is the case that a UE establishes a connection with a macro cell node, and the UE enters an uplink coverage area of a micro cell node, but the UE does not establish a connection with a micro cell node, and its specific scenario, specific content of uplink configuration information of the UE and a configuration notification message included in an interference cancellation request sent may refer to the foregoing embodiment, and similarly, the UE described in this embodiment is all UE in a macro cell.
The sending module 21 is further configured to send a configuration notification message to the micro cell node, so that the micro cell node performs interference cancellation according to the interference cancellation request and the configuration notification message, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
In this embodiment, since the sending module 21 sends the uplink configuration information for eliminating the uplink signal of the macro cell UE in the uplink pressure die and the uplink MIMO or uplink CLTD configuration, for the macro cell, the uplink sending mode of the UE that generates interference to the micro cell in the cell is known, that is, the uplink configuration mode of the UE is known, so that the macro cell may also notify the uplink configuration mode of the UE to the micro cell node that is to perform interference elimination to instruct the micro cell node to perform interference elimination on the uplink signal of the macro cell UE; generally, the uplink configuration information sent by the sending module 21 corresponds to the uplink configuration mode of the UE indicated by the configuration notification message; for example, when the UE of the macro cell is in uplink configuration, the uplink configuration information of the UE sent by the sending module 21 specifically includes the uplink configuration information; specifically, the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink stamper configuration, so that the micro cell node determines a sending time slot of an uplink signal of the UE according to the uplink stamper configuration information and the uplink stamper configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot; the way of demodulating and interference eliminating the received signal by the microcell node is the same as the above embodiment, and therefore, the description thereof is omitted.
For another example, when the UE of the macro cell is in uplink MIMO or uplink CLTD configuration, the uplink configuration information of the UE sent by the sending module 21 specifically includes a gain factor used for calculating the S-DPCCH; specifically, the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink MIMO or uplink CLTD configuration, so that the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor used for calculating the S-DPCCH, thereby acquiring an uplink signal of the UE; and canceling the uplink signal of the UE in the received uplink signal. The specific way of performing interference cancellation on the uplink signal generated by the macro cell UE in the specific scenario in this embodiment is the same as that in the above embodiment, and therefore, the detailed description thereof is omitted here.
The macro cell node provided in the embodiment of the present invention, through the interference cancellation request and the configuration notification message sent to the micro cell node interfered by the uplink signal of the macro cell UE, enables the micro cell node to cancel the uplink signal of the macro cell UE in the received signal according to the uplink configuration information of the UE generating the interference signal to the micro cell included in the interference cancellation request and the uplink configuration mode of the UE indicated by the configuration notification message, so that when the macro cell UE is configured to send signals in different scenarios, the macro cell UE can all perform cancellation processing on the interference signal generated by the macro cell UE, and particularly when the macro cell UE is in uplink stamper configuration, uplink MIMO configuration or uplink CLTD configuration, the problem of low practicability due to only considering the conventional scenario of UE uplink configuration is solved, the uplink interference signal elimination can be realized in more application scenes, and the application scenes are wide.
In specific implementation, the uplink configuration information of the UE described in this embodiment may further include other optional configuration information, and the optional parameters of the configuration information and the specific meanings of each parameter may also refer to table 1 above.
Similar to the above embodiment, the interference cancellation request may correspond to a connected UE of a macro cell node, and the interference cancellation request includes uplink configuration information of the macro cell UE accessing to the macro cell node, and the micro cell node may detect the corresponding UE according to the information and cancel the detected uplink signal of the macro cell UE.
Or, the interference cancellation request may correspond to a macro cell UE causing uplink interference to the micro cell, where the interference cancellation request only includes uplink configuration information of the macro cell UE causing uplink interference to the micro cell, and the micro cell node may specifically detect the corresponding UE according to the configuration information and cancel the detected uplink signal of the macro cell UE.
Further, fig. 6 is a schematic structural diagram of another macro cell node according to an embodiment of the present invention, and on the basis of fig. 5, in the macro cell node according to the embodiment, the sending module 21 may include: a determining unit 22, configured to determine a UE causing uplink interference to a micro cell; a sending unit 23, configured to send, to the micro cell node, an interference cancellation request including the uplink configuration information of the UE indicated by the determination result obtained by the determining unit 22.
In a specific implementation of this embodiment, since the micro cell node has a large workload for detecting and eliminating all the macro cell UEs, in order to reduce the workload of the micro cell node, the range of the macro cell UEs to be detected by the micro cell node may be reduced. Therefore, the UE corresponding to the interference cancellation request may also be a UE that causes uplink interference to the micro cell and is determined by the macro cell node.
Optionally, in this embodiment, the macro cell node may actively send an interference cancellation request, or the micro cell node may trigger the micro cell node to initiate the request; specifically, the macro cell node provided in this embodiment further includes: a receiving module 24, configured to receive an interference cancellation indication sent by the micro cell node before the sending module 21 sends an interference cancellation request to the micro cell node; accordingly, the sending module 21 is specifically configured to send an interference cancellation request to the micro cell node according to the interference cancellation indication received by the receiving module 24; or, the receiving module 24 is configured to receive the uplink interference level of the micro cell sent by the micro cell node before the sending module 21 sends the interference cancellation request to the micro cell node, where the uplink interference level may be characterized by SIR, SNR, or SINR of a received signal, for example; correspondingly, the sending module 21 is specifically configured to send an interference cancellation request to the micro cell node when detecting that the uplink interference degree received by the receiving module 24 is higher than a predefined threshold; if the uplink interference degree does not exceed the predefined threshold, an interference elimination request does not need to be sent, so that the interference elimination load of the micro cell node is reduced when the interference degree is low, and the power consumption is reduced.
The macro cell node receives the indication message or the uplink interference degree sent by the micro cell node through the receiving module 24, that is, the condition for triggering the macro cell node to send the interference elimination request; the interference cancellation indication may also be sent periodically by the micro cell node to reduce uplink interference of the micro cell. Specifically, the interference cancellation indication is an explicit indication, and requires the macrocell node to send an interference cancellation request; the uplink interference degree sent by the micro cell node is an implicit indication, and the macro cell node sends an interference elimination request to the micro cell node according to whether the uplink interference degree received by the micro cell is higher than a predefined threshold or not as a trigger condition; the uplink interference degree suffered by the micro cell can be determined by the uplink interference caused by the macro cell UE, and also can be determined by the uplink interference caused by the connected UE of the macro cell received by the micro cell.
In the macro cell node provided in this embodiment, the receiving module 24 is further configured to receive, before the sending module 21 sends the interference cancellation request to the micro cell node, the capability information of interference cancellation sent by the micro cell node; accordingly, the sending module 21 is specifically configured to send the interference cancellation request to the micro cell node according to the capability information of interference cancellation.
In this embodiment, the macro cell node may obtain an indication whether the micro cell node supports the information of the interference cancellation capability, so that if the micro cell node does not have the interference cancellation capability, the macro cell node does not need to send an interference cancellation request to the micro cell node. For example, the case where the micro cell node does not support interference cancellation may be: the micro cell node may not have the capability of eliminating the uplink signal of the macro cell UE from the received uplink signal due to different device performances, or may cause an overload of interference cancellation of the micro cell node due to an interference cancellation operation already being performed, and the like.
Further, in the macro cell node provided in this embodiment, the receiving module 24 is further configured to receive an interference cancellation response sent by the micro cell node after the sending module 21 sends the interference cancellation request to the micro cell node; correspondingly, the macro cell node of this embodiment further includes an interference processing module 25, configured to perform an operation of further eliminating interference according to the interference cancellation response received by the receiving module 24.
In this embodiment, the processing result of the interference signal generated by the macro cell UE by the micro cell node indicated by the interference cancellation response and the further interference reduction operation performed by the macro cell node are similar to the above-mentioned embodiments shown in fig. 2 and 4, and therefore, the description thereof is omitted here.
According to the macro cell node provided by the embodiment of the invention, the micro cell node can eliminate the uplink signal of the macro cell UE in the received signal according to the uplink configuration information of the UE generating the interference signal to the micro cell and the uplink configuration mode of the UE indicated by the configuration notification message, which are contained in the interference elimination request, by sending the interference elimination request and the configuration notification message to the micro cell node interfered by the uplink signal of the macro cell UE, so that the macro cell node can eliminate the interference signal generated by the macro cell UE when the uplink channel of the macro cell UE is configured in different scenes, and especially can eliminate the uplink interference signal when the macro cell UE is configured in uplink compression mode, uplink MIMO or uplink CLTD. In addition, in this embodiment, a UE causing uplink interference to the micro cell is determined in advance, and the range of the macro cell UE that needs to perform interference cancellation is narrowed, so that not only is the amount of information included in the interference cancellation request reduced, but also the interference cancellation load of the micro cell node is reduced.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions.
EXAMPLE III
Fig. 7 is a schematic structural diagram of a micro cell node according to a third embodiment of the present invention. As shown in fig. 7, the micro cell node provided in this embodiment specifically includes: a receiver 31 and a processor 32.
The receiver 31 is configured to receive an interference cancellation request sent by a macro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating an S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink DPCCH of the UE and the configuration information of the E-DPCCH.
The receiver 31 is further configured to receive a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
A processor 32, configured to perform interference cancellation according to the interference cancellation request and the configuration notification message received by the receiver 31.
The micro cell node provided in the embodiment of the present invention is an entity apparatus corresponding to the micro cell node provided in the embodiment shown in fig. 2 of the present invention, and each entity device corresponds to each module function of the micro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and are not described herein again.
In this embodiment, the UE uplink configuration information included in the received uplink configuration information for performing interference cancellation on an uplink signal of a macro cell UE in uplink compression mode and uplink MIMO or uplink CLTD configuration corresponds to the uplink configuration mode of the UE indicated by the received configuration notification message; for example, when the configuration notification message received by the receiver 31 indicates that the uplink configuration method of the UE includes uplink stamper configuration; correspondingly, the processor 32 is specifically configured to determine a transmission timeslot of an uplink signal of the UE according to the uplink stamper configuration indicated by the uplink stamper configuration message received by the receiver 31; and eliminating the uplink signal of the UE in the received uplink signal according to the transmission time slot.
For another example, when the configuration notification message received by the receiver 31 indicates that the uplink configuration method of the UE includes uplink MIMO or uplink closed-loop transmit diversity CLTD configuration; accordingly, the processor 32 is specifically configured to demodulate the signal of the uplink S-DPCCH of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor for calculating the S-DPCCH received by the receiver 31, so as to obtain the uplink signal of the UE; and eliminates the uplink signal of the UE in the received uplink signal. In this embodiment, a specific manner for performing interference cancellation on the macro cell UE in the special configuration scenario is described in other embodiments of the present invention, and therefore, no further description is given here.
Further, in the micro cell node provided in this embodiment, the processor 32 is configured to perform interference cancellation according to the interference cancellation request and the configuration notification message received by the receiver 31, and specifically includes: detecting an uplink signal of the UE corresponding to the interference elimination request according to the uplink configuration information of the UE contained in the interference elimination request; and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message. In another implementation manner of the embodiment of the present invention, since the workload of the micro cell node for detecting and eliminating all the macro cell UEs is large, the range of the macro cell UE to be detected by the micro cell node may be reduced in order to reduce the workload of the micro cell node. Therefore, the UE corresponding to the interference cancellation request may also be the UE that causes uplink interference to the micro cell and is determined by the macro cell node.
Optionally, in this embodiment, the macro cell node may actively send an interference cancellation request, or the micro cell node may trigger the micro cell node to initiate the request; specifically, the micro cell node provided by this embodiment further includes: a transmitter 33, configured to send an interference cancellation instruction to the macrocell node before the receiver 31 receives the interference cancellation request sent by the macrocell node, so that the macrocell node sends the interference cancellation request to the microcell node according to the interference cancellation instruction; or, the transmitter 33 is configured to send, before the receiver 31 receives the interference cancellation request sent by the macro cell node, the uplink interference level of the micro cell to the macro cell node, so that the macro cell node sends the interference cancellation request to the micro cell node when detecting that the uplink interference level is higher than the predefined threshold; the uplink interference level may be characterized by SIR, SNR, or SINR of the received signal, for example.
In the micro cell node provided in this embodiment, the transmitter 33 is further configured to send, before the receiver 31 receives the interference cancellation request sent by the macro cell node, the capability information of interference cancellation to the macro cell node, so that the macro cell node sends the interference cancellation request to the micro cell node according to the capability information of interference cancellation.
Further, in the micro cell node provided in this embodiment, the transmitter 33 is further configured to, after the receiver 31 receives the interference cancellation request sent by the macro cell node, send an interference cancellation response to the macro cell node, so that the macro cell node performs an operation of further cancelling interference according to the interference cancellation response.
The micro cell node provided in the embodiment of the present invention is an entity apparatus corresponding to the micro cell node provided in the embodiment shown in fig. 4 of the present invention, where each entity device corresponds to each module function of the micro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and are not described herein again.
Example four
Fig. 8 is a schematic structural diagram of a macro cell node according to a fourth embodiment of the present invention. As shown in fig. 8, the macro cell node provided in this embodiment specifically includes: a transmitter 41.
The transmitter 41 is configured to send an interference cancellation request to the micro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating an S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink DPCCH of the UE and the configuration information of the E-DPCCH.
The transmitter 41 is further configured to send a configuration notification message to the micro cell node, so that the micro cell node performs interference cancellation according to the interference cancellation request and the configuration notification message, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
The macro cell node provided in the embodiment of the present invention is an entity apparatus corresponding to the macro cell node provided in the embodiment shown in fig. 5 of the present invention, where each entity device corresponds to each module function of the micro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and are not described herein again.
In this embodiment, because the uplink configuration information of the UE, which is included in the uplink configuration information sent by the transmitter 41 and used for performing interference cancellation on the uplink signal of the macro cell UE under uplink pressure die and uplink MIMO or uplink CLTD configuration, for the macro cell, the uplink transmission mode of the UE that generates interference to the micro cell in the cell is known, that is, the uplink configuration mode of the UE is known, the macro cell may further notify the uplink configuration mode of the UE to the micro cell node to be subjected to interference cancellation to instruct the micro cell node to perform interference cancellation on the uplink signal of the macro cell UE; generally, the uplink configuration information sent by the transmitter 41 corresponds to the uplink configuration mode of the UE indicated by the configuration notification message; for example, when the UE of the macro cell is in the uplink configuration, the uplink configuration information of the UE sent by the transmitter 41 specifically includes the uplink configuration information; specifically, the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink stamper configuration, so that the micro cell node determines a sending time slot of an uplink signal of the UE according to the uplink stamper configuration information and the uplink stamper configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot; the way of demodulating and interference eliminating the received signal by the microcell node is the same as the above embodiment, and therefore, the description thereof is omitted.
For another example, when the UE of the macro cell is in uplink MIMO or uplink CLTD configuration, the uplink configuration information of the UE sent by the transmitter 41 specifically includes a gain factor for calculating the S-DPCCH; specifically, the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink MIMO or uplink CLTD configuration, so that the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor used for calculating the S-DPCCH, thereby acquiring an uplink signal of the UE; and canceling the uplink signal of the UE in the received uplink signal. The specific way of performing interference cancellation on the uplink signal generated by the macro cell UE in the specific scenario in this embodiment is the same as that in the above embodiment, and therefore, the detailed description thereof is omitted here.
Further, in the macro cell node provided in this embodiment, the transmitter 41 is configured to send an interference cancellation request to the micro cell node, and specifically includes: determining UE causing uplink interference to a micro cell; and sending an interference cancellation request including the uplink configuration information of the UE indicated by the determination result to the micro cell node.
In a specific implementation of this embodiment, since the micro cell node has a large workload for detecting and eliminating all the macro cell UEs, in order to reduce the workload of the micro cell node, the range of the macro cell UEs to be detected by the micro cell node may be reduced. Therefore, the UE corresponding to the interference cancellation request may also be the UE that causes uplink interference to the micro cell and is determined by the macro cell node.
Optionally, in this embodiment, the macro cell node may actively send an interference cancellation request, or the micro cell node may trigger the micro cell node to initiate the request; specifically, the micro-macro cell node provided in this embodiment further includes: a receiver 42, configured to receive an interference cancellation indication sent by the micro cell node before the transmitter 41 sends an interference cancellation request to the micro cell node; accordingly, the transmitter 41 is specifically configured to transmit an interference cancellation request to the micro cell node according to the interference cancellation indication received by the receiver 42; or, the receiver 42 is configured to receive, before the transmitter 41 sends the interference cancellation request to the micro cell node, an uplink interference level of the micro cell sent by the micro cell node, where the uplink interference level may be characterized by SIR, SNR, or SINR of a received signal, for example; accordingly, the transmitter 41 is specifically configured to send an interference cancellation request to the femtocell node when detecting that the uplink interference level received by the receiver 42 is higher than a predefined threshold; if the uplink interference degree does not exceed the predefined threshold, an interference elimination request does not need to be sent, so that the interference elimination load of the micro cell node is reduced when the interference degree is low, and the power consumption is reduced.
In the macro cell node provided in this embodiment, the receiver 42 is further configured to receive, before the transmitter 41 sends the interference cancellation request to the micro cell node, the capability information of interference cancellation sent by the micro cell node; accordingly, the transmitter 41 is specifically configured to transmit the interference cancellation request to the micro cell node according to the capability information of interference cancellation.
Further, in the macro cell node provided in this embodiment, the receiver 42 is further configured to receive an interference cancellation response sent by the micro cell node after the transmitter 41 sends the interference cancellation request to the micro cell node; accordingly, the macro cell node of this embodiment further includes a processor 43 for performing an operation of further canceling interference according to the interference cancellation response received by the receiver 42.
The macro cell node provided in the embodiment of the present invention is an entity apparatus corresponding to the macro cell node provided in the embodiment shown in fig. 6 of the present invention, where each entity device corresponds to each module function of the micro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and are not described herein again.
Fig. 9 is a schematic structural diagram of an uplink interference processing system according to an embodiment of the present invention. As shown in fig. 9, the uplink interference processing system provided in this embodiment specifically includes: a macro cell node 51 and a micro cell node 52.
The macro cell node 51 is configured to send an interference cancellation request to the micro cell node 52, where the interference cancellation request includes uplink configuration information of the UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating an S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink dedicated physical control channel DPCCH of the UE and the configuration information of the enhanced dedicated physical control channel E-DPCCH; and sending a configuration notification message to the micro cell node, wherein the configuration notification message is used for indicating an uplink configuration mode of the UE.
The micro cell node 52 is configured to receive the interference cancellation request and the configuration notification message sent by the macro cell node 51.
The micro cell node 52 is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message.
The uplink interference processing system provided in the embodiment of the present invention is a processing system corresponding to the micro cell node provided in the embodiment shown in fig. 2 and the macro cell node provided in the embodiment shown in fig. 5 of the present invention, and the implementation principle and the technical effect are similar, and are not described herein again.
In this embodiment, the UE uplink configuration information included in the received uplink configuration information for performing interference cancellation on an uplink signal of a macro cell UE in uplink compression mode and uplink MIMO or uplink CLTD configuration corresponds to the uplink configuration mode of the UE indicated by the received configuration notification message; for example, when the UE of the macro cell is in uplink configuration, the uplink configuration information of the UE specifically includes the uplink configuration information; the configuration notification message sent by the macro cell node 51 to the micro cell node 52 indicates that the uplink configuration method of the UE includes uplink compression mode configuration; the micro cell node 52 is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes: determining the sending time slot of the uplink signal of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the transmission time slot.
For another example, when the UE of the macro cell is in uplink MIMO or CLTD configuration, the uplink configuration information of the UE specifically includes the gain factor for calculating the S-DPCCH; the configuration notification message sent by the macro cell node 51 to the micro cell node 52 indicates that the uplink configuration method of the UE includes uplink MIMO or uplink CLTD configuration; the micro cell node 52 is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes: demodulating the uplink S-DPCCH signal of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor used for calculating the S-DPCCH, thereby acquiring the uplink signal of the UE; and eliminates the uplink signal of the UE in the received uplink signal. In this embodiment, a specific manner for performing interference cancellation on the macro cell UE in the special configuration scenario is described in other embodiments of the present invention, and therefore, no further description is given here.
Further, in the uplink interference processing system provided in this embodiment, the micro cell node 52 is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes: detecting an uplink signal of the UE corresponding to the interference elimination request according to uplink configuration information of the UE contained in the interference elimination request; and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message. In another implementation manner of the embodiment of the present invention, since the workload of the micro-cell node 52 for detecting and eliminating all the macro-cells UE is large, the range of the macro-cells UE to be detected by the micro-cell node 52 may be reduced in order to reduce the workload of the micro-cell node 52. Therefore, the macro cell node 51 is specifically configured to determine a UE causing uplink interference to the micro cell; and sends an interference cancellation request including the uplink configuration information of the UE indicated by the determination result to the micro cell node 52.
Optionally, in the uplink interference processing system provided in this embodiment, the macro cell node 51 may actively send an interference cancellation request, or the micro cell node 52 may trigger it to initiate the request; specifically, the micro cell node 52 is further configured to send an interference cancellation indication to the macro cell node 51 before receiving the interference cancellation request sent by the macro cell node 51; accordingly, the macrocell node 51 is specifically configured to send an interference cancellation request to the microcell node 52 according to the interference cancellation indication; alternatively, the micro-cell node 52 is further configured to send, to the macro-cell node 51, an uplink interference level of the micro-cell before receiving the interference cancellation request sent by the macro-cell node 51, where the uplink interference level may be characterized by, for example, SIR, SNR, or SINR of a received signal; accordingly, the macro cell node 51 is specifically configured to send an interference cancellation request to the micro cell node when detecting that the uplink interference level is higher than a predefined threshold.
In the uplink interference processing system provided in this embodiment, the micro cell node 52 is further configured to send, before receiving an interference cancellation request sent by the macro cell node 51, capability information for interference cancellation to the macro cell node 51; accordingly, the macrocell node 51 is specifically configured to send the interference cancellation request to the microcell node 52 according to the capability information of interference cancellation.
Furthermore, in the uplink interference processing system provided in this embodiment, the micro cell node 52 is further configured to send an interference cancellation response to the macro cell node 51 after receiving the interference cancellation request sent by the macro cell node 51; accordingly, the macrocell node 51 is also configured to perform further interference cancellation operations for the interference cancellation response.
The uplink interference processing system provided in the embodiment of the present invention is a processing system corresponding to the micro cell node provided in the embodiment shown in fig. 4 and the macro cell node provided in the embodiment shown in fig. 6 of the present invention, and the implementation principle and the technical effect are similar, and are not described herein again.
EXAMPLE five
Fig. 10 is a flowchart of an uplink interference processing method according to a fifth embodiment of the present invention. The micro-cell node of the embodiment is suitable for the situation of interference elimination in the Hetnet network. The method may be performed by a micro cell node, typically implemented in hardware and software, which may be integrated in a memory of the micro cell node, e.g. in a processor chip, for execution by a processor call. The method of the embodiment comprises the following steps:
s110, the micro cell node receives an interference cancellation request sent by the macro cell node, where the interference cancellation request includes uplink configuration information of the UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating an S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink DPCCH of the UE and the configuration information of the E-DPCCH.
S120, receiving a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
And S130, carrying out interference elimination according to the interference elimination request and the configuration notification message.
The uplink interference processing method provided in the embodiment of the present invention may be executed by the micro cell node provided in the embodiment shown in fig. 2 of the present invention, and each step of the method corresponds to each module function of the micro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and are not described herein again.
In this embodiment, the UE uplink configuration information included in the received uplink configuration information for performing interference cancellation on an uplink signal of a macro cell UE in uplink compression mode and uplink MIMO or uplink CLTD configuration corresponds to the uplink configuration mode of the UE indicated by the received configuration notification message; for example, when the configuration notification message indicates that the uplink configuration method of the UE includes uplink stamper configuration; correspondingly, S130 specifically includes: determining the sending time slot of the uplink signal of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the transmission time slot.
For another example, when the configuration notification message indicates that the uplink configuration method of the UE includes uplink MIMO or uplink closed loop transmit diversity CLTD configuration; correspondingly, S130 specifically includes: demodulating the uplink S-DPCCH signal of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor used for calculating the S-DPCCH, thereby acquiring the uplink signal of the UE; and eliminates the uplink signal of the UE in the received uplink signal. In this embodiment, a specific manner for performing interference cancellation on the macro cell UE in the special configuration scenario is described in other embodiments of the present invention, and therefore, no further description is given here.
Further, in the uplink interference processing method provided in this embodiment, S130 may include: detecting an uplink signal of the UE corresponding to the interference elimination request according to the uplink configuration information of the UE contained in the interference elimination request; and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message. In another implementation manner of the embodiment of the present invention, since the workload of the micro cell node for detecting and eliminating all the macro cell UEs is large, the range of the macro cell UE to be detected by the micro cell node may be reduced in order to reduce the workload of the micro cell node. Therefore, the UE corresponding to the interference cancellation request may also be the UE that causes uplink interference to the micro cell and is determined by the macro cell node.
Optionally, in this embodiment, the macro cell node may actively send an interference cancellation request, or the micro cell node may trigger the micro cell node to initiate the request; specifically, the method provided by this implementation, before S110, may further include: sending an interference elimination instruction to a macro cell node so that the macro cell node sends an interference elimination request to a micro cell node according to the interference elimination instruction; or sending the uplink interference degree of the micro cell to the macro cell node, so that the macro cell node sends an interference elimination request to the micro cell node when detecting that the uplink interference degree is higher than a predefined threshold; the uplink interference level may be characterized by SIR, SNR, or SINR of the received signal, for example.
The method provided by this embodiment may further include, before S110: and sending the capability information of interference elimination to the macro cell node so that the macro cell node sends an interference elimination request to the micro cell node according to the capability information of interference elimination.
It can be understood that, when the uplink interference method provided in this embodiment is executed, the method may simultaneously include the optional steps of sending the interference cancellation indication to the macro cell node and sending the interference cancellation capability information to the macro cell node, where the two optional steps do not have an execution sequence, and may be executed simultaneously, or may execute another step after one step is executed.
Further, the method provided in this embodiment, after S110, may include: and sending an interference elimination response to the macro cell node so that the macro cell node performs the operation of further eliminating the interference according to the interference elimination response.
The uplink interference processing method provided in the embodiment of the present invention may be executed by the micro cell node provided in the embodiment shown in fig. 4 of the present invention, and each step of the method corresponds to each module function of the micro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar, and are not described herein again.
EXAMPLE six
Fig. 11 is a flowchart of an uplink interference processing method according to a sixth embodiment of the present invention. The micro-cell node of the embodiment is suitable for the situation of interference elimination in the Hetnet network. The method may be performed by a macro cell node, which may be implemented in hardware and software, and may be integrated in a memory of the macro cell node, e.g., in a processor chip, for execution by a processor call. The method of the embodiment comprises the following steps:
s210, the macro cell node sends an interference cancellation request to the micro cell node, where the interference cancellation request includes uplink configuration information of the UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating an S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the uplink DPCCH of the UE and the configuration information of the E-DPCCH.
S220, sending a configuration notification message to the micro cell node, so that the micro cell node performs interference cancellation according to the interference cancellation request and the configuration notification message, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
The uplink interference processing method provided in the embodiment of the present invention may be executed by the macro cell node provided in the embodiment shown in fig. 5 of the present invention, and each step of the method corresponds to each module function of the macro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar and will not be described herein again.
In this embodiment, the UE uplink configuration information included in the transmitted uplink configuration information for performing interference cancellation on an uplink signal of a macro cell UE in uplink compression mode and uplink MIMO or uplink CLTD configuration corresponds to the uplink configuration mode of the UE indicated by the transmitted configuration notification message; for example, when the UE of the macro cell is in the uplink stamper configuration, the uplink configuration information of the UE specifically includes the uplink stamper configuration information; specifically, the configuration notification message sent to the micro cell node in S220 indicates that the uplink configuration method of the UE includes uplink stamper configuration, so that the micro cell node determines a sending time slot of an uplink signal of the UE according to the uplink stamper configuration information and the uplink stamper configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot.
For another example, when the UE of the macro cell is in uplink MIMO or uplink CLTD configuration, the uplink configuration information of the UE specifically includes a gain factor for calculating the S-DPCCH; specifically, in S220, the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink MIMO or uplink CLTD configuration, specifically, the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the gain factor for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, thereby acquiring an uplink signal of the UE; and canceling the uplink signal of the UE in the received uplink signal. In this embodiment, a specific manner for performing interference cancellation on the macro cell UE in the special configuration scenario is described in other embodiments of the present invention, and therefore, no further description is given here.
Further, in the uplink interference processing method provided in this embodiment, S210 may include: determining UE causing uplink interference to a micro cell; and sending an interference elimination request comprising the uplink configuration information of the UE indicated by the determination result to the micro cell node.
In a specific implementation of this embodiment, since the micro cell node has a large workload for detecting and interference canceling all the macro cell UEs, in order to reduce the workload of the micro cell node, the range of the macro cell UEs to be detected by the micro cell node may be reduced. Therefore, the UE corresponding to the interference cancellation request may also be a UE that causes uplink interference to the micro cell and is determined by the macro cell node.
Optionally, in this embodiment, the macro cell node may actively send an interference cancellation request, or the micro cell node may trigger the micro cell node to initiate the request; specifically, the method provided by this implementation, before S210, may include: receiving an interference elimination indication sent by a micro cell node; accordingly, S210 may be replaced with: the macro cell node sends an interference elimination request to the micro cell node according to the interference elimination indication sent by the micro cell node; alternatively, before S210, may include: receiving an uplink interference degree of the micro cell sent by a node of the micro cell, wherein the uplink interference degree can be characterized by SIR, SNR or SINR of a received signal, for example; accordingly, S210 is replaced by: and when detecting that the uplink interference degree is higher than a predefined threshold, the macro cell node sends an interference elimination request to the micro cell node.
Optionally, the method provided in this embodiment, before S210, may further include: receiving interference elimination capability information sent by a micro cell node; accordingly, S210 may be replaced with: and the macro cell node sends the interference elimination request to the micro cell node according to the capability information of the interference elimination.
It can be understood that, when the uplink interference method provided in this embodiment is executed, the method may simultaneously include the optional steps of receiving the interference cancellation indication sent by the micro cell node and receiving the interference cancellation capability information sent by the micro cell node, where the two optional steps do not have an execution sequence, and may be executed simultaneously, or may execute another step after one step is executed.
Further, the method provided in this embodiment, after S210, may include: receiving an interference cancellation response sent by a micro cell node; and performing an operation of further eliminating the interference according to the interference cancellation response.
The uplink interference processing method provided in the embodiment of the present invention may be executed by the macro cell node provided in the embodiment shown in fig. 6 of the present invention, and each step of the method corresponds to each module function of the macro cell node provided in the embodiment of the present invention, and the implementation principle and technical effect thereof are similar and will not be described herein again.
In the several embodiments provided in the present invention, it should be understood that the disclosed system, the micro cell node or the macro cell node according to the embodiments of the present invention are suitable for performing interference cancellation in the Hetnet network. The micro cell node and the macro cell node provided by the embodiment of the invention respectively comprise devices and methods, and can be realized in other modes. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a form of hardware or a form of a software functional unit.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (36)

1. A microcell node, comprising:
a receiving module, configured to receive an interference cancellation request sent by a macro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink configuration information or a gain factor used for calculating a secondary dedicated physical control channel S-DPCCH, and at least one of: the uplink scrambling code information of the UE, the time slot format information of the uplink DPCCH of the UE, and the configuration information used for determining the position information of the uplink dedicated physical control channel DPCCH of the UE and the enhanced dedicated physical control channel E-DPCCH;
the receiving module is further configured to receive a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE;
and an interference processing module, configured to perform interference cancellation according to the interference cancellation request and the configuration notification message received by the receiving module.
2. The picocell node according to claim 1, wherein said interference processing module includes:
a detecting unit, configured to detect an uplink signal of the UE corresponding to the interference cancellation request according to uplink configuration information of the UE included in the interference cancellation request received by the receiving module;
a cancellation unit, configured to cancel, in the received uplink signal, the uplink signal of the UE detected by the detection unit according to the uplink configuration manner indicated by the configuration notification message received by the receiving module.
3. The micro-cell node according to claim 1 or 2, wherein the configuration notification message received by the receiving module indicates that the uplink configuration method of the UE includes uplink stamper configuration;
the interference processing module is specifically configured to determine a transmission timeslot of an uplink signal of the UE according to the uplink stamper configuration information received by the receiving module and the uplink stamper configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the sending time slot.
4. The microcell node according to claim 1 or 2, wherein the configuration notification message received by the receiving module indicates that the uplink configuration method of the UE comprises uplink multiple input multiple output MIMO or uplink closed loop transmit diversity CLTD configuration;
the interference processing module is specifically configured to demodulate a signal of the uplink S-DPCCH of the UE according to the gain factor received by the receiving module and used for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, so as to obtain an uplink signal of the UE; and eliminating the uplink signal of the UE in the received uplink signal.
5. The femtocell node of claim 1 or 2, wherein the UE is a macrocell UE determined by the macrocell node to cause uplink interference to a femtocell.
6. The picocell node according to claim 1, further comprising: a sending module, configured to send an interference cancellation instruction to a macro cell node before the receiving module receives an interference cancellation request sent by the macro cell node, so that the macro cell node sends the interference cancellation request to the micro cell node according to the interference cancellation instruction; or,
the sending module is configured to send the uplink interference degree of the microcell to the macrocell node before the receiving module receives the interference cancellation request sent by the macrocell node, so that the macrocell node sends the interference cancellation request to the microcell node when detecting that the uplink interference degree is higher than a predefined threshold.
7. The femtocell node of claim 6, wherein the sending module is further configured to send capability information of interference cancellation to the macrocell node before the receiving module receives the interference cancellation request sent by the macrocell node, so that the macrocell node sends the interference cancellation request to the femtocell node according to the capability information of interference cancellation.
8. The femtocell node of claim 6 or 7, wherein the sending module is further configured to send an interference cancellation response to the macrocell node after the receiving module receives the interference cancellation request sent by the macrocell node, so that the macrocell node performs an operation of further cancelling interference according to the interference cancellation response.
9. A macro cell node, comprising:
a sending module, configured to send an interference cancellation request to a micro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink stamper configuration information or a gain factor used for calculating a secondary dedicated physical control channel S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH;
the sending module is further configured to send a configuration notification message to a micro cell node, so that the micro cell node performs interference cancellation according to the interference cancellation request and the configuration notification message, where the configuration notification message is used to indicate an uplink configuration mode of the UE.
10. The macrocell node according to claim 9, characterized in that the sending module comprises:
a determining unit, configured to determine a UE causing uplink interference to a pico cell;
a sending unit, configured to send, to the micro cell node, an interference cancellation request including the uplink configuration information of the UE indicated by the determination result obtained by the determining unit.
11. The macro cell node according to claim 9 or 10, wherein when the UE of the macro cell is in the uplink stamper configuration, the uplink configuration information of the UE sent by the sending module specifically includes the uplink stamper configuration information;
the uplink configuration method of the UE is indicated by the configuration notification message sent by the sending module to the micro cell node, wherein the configuration notification message comprises uplink die configuration, so that the micro cell node determines the sending time slot of the uplink signal of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot.
12. The macro-cell node according to claim 9 or 10, wherein when the UE of the macro-cell is in uplink MIMO or CLTD configuration, the uplink configuration information of the UE sent by the sending module specifically includes the gain factor for calculating S-DPCCH;
the sending module indicates that the uplink configuration method of the UE comprises uplink MIMO or uplink CLTD configuration to a micro cell node, so that the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the gain factor for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, and thus an uplink signal of the UE is obtained; and eliminating the uplink signal of the UE in the received uplink signal.
13. The macrocell node according to claim 9, characterized by further comprising: a receiving module, configured to receive an interference cancellation indication sent by a micro cell node before a sending module sends an interference cancellation request to the micro cell node;
the sending module is specifically configured to send an interference cancellation request to the micro cell node according to the interference cancellation indication received by the receiving module; or,
the receiving module is configured to receive the uplink interference degree of the micro cell sent by the micro cell node before the sending module sends the interference cancellation request to the micro cell node;
the sending module is specifically configured to send an interference cancellation request to the femtocell node when detecting that the uplink interference degree received by the receiving module is higher than a predefined threshold.
14. The macrocell node according to claim 13, wherein the receiving module is further configured to receive the capability information of interference cancellation sent by the microcell node before the sending module sends the request for interference cancellation to the microcell node;
the sending module is specifically configured to send the interference cancellation request to the micro cell node according to the capability information of interference cancellation received by the receiving module.
15. The macrocell node according to claim 13 or 14, wherein the receiving module is further configured to receive an interference cancellation response sent by the microcell node after the sending module sends an interference cancellation request to the microcell node;
and the interference processing module is used for executing the operation of further eliminating the interference according to the interference cancellation response received by the receiving module.
16. An uplink interference processing system, comprising: micro cell nodes and macro cell nodes;
the macro cell node is configured to send an interference cancellation request to a micro cell node, where the interference cancellation request includes uplink configuration information of a user equipment UE, where the uplink configuration information of the UE includes uplink compression mode configuration information or a gain factor used for calculating a secondary dedicated physical control channel S-DPCCH, and at least one of: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH; sending a configuration notification message to the micro cell node, wherein the configuration notification message is used for indicating an uplink configuration mode of the UE;
the micro cell node is configured to receive the interference cancellation request and the configuration notification message sent by the macro cell node;
the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message.
17. The system according to claim 16, wherein the macro cell node is configured to send an interference cancellation request to the micro cell node, and specifically includes:
determining UE causing uplink interference to a micro cell;
and sending an interference elimination request comprising the uplink configuration information of the UE indicated by the determination result to the micro cell node.
18. The system according to claim 16 or 17, wherein the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes:
detecting an uplink signal of the UE corresponding to the interference elimination request according to the uplink configuration information of the UE contained in the interference elimination request;
and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message.
19. The system according to claim 16 or 17, wherein when the UE of the macro cell is in an uplink configuration for pressing mode, the uplink configuration information of the UE specifically includes the uplink pressing mode configuration information; the configuration notification message sent by the macro cell node to the micro cell node indicates that the uplink configuration method of the UE comprises uplink compression mode configuration;
the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes:
the uplink die configuration information is used for indicating uplink die configuration of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message; and eliminating the uplink signal of the UE in the received uplink signal according to the sending time slot.
20. The system according to claim 16 or 17, wherein when the UE of the macro cell is in uplink MIMO or CLTD configuration, the uplink configuration information of the UE specifically includes the gain factor for calculating S-DPCCH; the configuration notification message sent by the macro cell node to the micro cell node indicates that the uplink configuration method of the UE comprises uplink MIMO or uplink CLTD configuration;
the micro cell node is further configured to perform interference cancellation according to the interference cancellation request and the configuration notification message, and specifically includes:
the uplink signal acquisition unit is used for demodulating the signal of the uplink S-DPCCH of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor for calculating the S-DPCCH, so as to acquire the uplink signal of the UE; and eliminating the uplink signal of the UE in the received uplink signal.
21. The system according to claim 16, wherein said micro-cell node is further configured to send an interference cancellation indication to said macro-cell node prior to receiving said interference cancellation request sent by said macro-cell node;
the macro cell node is configured to send an interference cancellation request to the micro cell node, and specifically includes: the micro cell node is used for sending an interference elimination request to the micro cell node according to the interference elimination indication; or,
the micro cell node is further configured to send an uplink interference degree of the micro cell to the macro cell node before receiving the interference cancellation request sent by the macro cell node;
the macro cell node is configured to send an interference cancellation request to the micro cell node, and specifically includes: and the base station is used for sending an interference elimination request to the micro cell node when the uplink interference degree is detected to be higher than a predefined threshold.
22. An uplink interference processing method, comprising:
the method comprises the following steps that a micro cell node receives an interference elimination request sent by a macro cell node, wherein the interference elimination request comprises uplink configuration information of User Equipment (UE), the uplink configuration information of the UE comprises uplink compression mold configuration information or a gain factor used for calculating an auxiliary dedicated physical control channel (S-DPCCH), and at least one of the following steps: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH;
receiving a configuration notification message sent by the macro cell node, where the configuration notification message is used to indicate an uplink configuration mode of the UE;
and carrying out interference elimination according to the interference elimination request and the configuration notification message.
23. The method of claim 22, wherein the performing interference cancellation according to the interference cancellation request and the configuration notification message comprises:
detecting an uplink signal of the UE corresponding to the interference elimination request according to the uplink configuration information of the UE contained in the interference elimination request;
and eliminating the detected uplink signal of the UE in the received uplink signal according to the uplink configuration mode indicated by the configuration notification message.
24. The method according to claim 22 or 23, wherein the configuration notification message indicates that the uplink configuration method of the UE comprises uplink stamper configuration;
the performing interference cancellation according to the interference cancellation request and the configuration notification message includes:
determining a sending time slot of an uplink signal of the UE according to the uplink die configuration information and the uplink die configuration indicated by the configuration notification message;
and eliminating the uplink signal of the UE in the received uplink signal according to the sending time slot.
25. The method according to claim 22 or 23, wherein the configuration notification message indicates that the uplink configuration method of the UE comprises uplink multiple-input multiple-output, MIMO, or uplink closed loop transmit diversity, CLTD, configuration;
the performing interference cancellation according to the interference cancellation request and the configuration notification message includes:
demodulating the uplink S-DPCCH signal of the UE according to the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message and the gain factor for calculating the S-DPCCH, thereby acquiring the uplink signal of the UE;
and eliminating the uplink signal of the UE in the received uplink signal.
26. The method of claim 22 or 23, wherein the UE is a macro cell UE determined by the macro cell node to cause uplink interference to a micro cell.
27. The method of claim 22, wherein before the micro-cell node receives the request for interference cancellation sent by the macro-cell node, further comprising:
sending an interference elimination instruction to the macro cell node so that the macro cell node sends an interference elimination request to the micro cell node according to the interference elimination instruction; or,
and sending the uplink interference degree of the micro cell to the macro cell node, so that the macro cell node sends an interference elimination request to the micro cell node when detecting that the uplink interference degree is higher than a predefined threshold.
28. The method of claim 27, wherein before the micro-cell node receives the request for interference cancellation sent by the macro-cell node, further comprising:
and sending the capability information of interference cancellation to the macro cell node, so that the macro cell node sends the interference cancellation request to the micro cell node according to the capability information of interference cancellation.
29. The method according to claim 27 or 28, wherein after the micro cell node receives the interference cancellation request sent by the macro cell node, further comprising:
and sending an interference elimination response to the macro cell node so that the macro cell node performs the operation of further eliminating the interference according to the interference elimination response.
30. An uplink interference processing method, comprising:
a macro cell node sends an interference elimination request to a micro cell node, wherein the interference elimination request comprises uplink configuration information of User Equipment (UE), the uplink configuration information of the UE comprises uplink compression mold configuration information or a gain factor used for calculating a secondary dedicated physical control channel (S-DPCCH), and at least one of the following: the uplink scrambling code information of the UE is used for determining the position information of the UE uplink dedicated physical control channel DPCCH and the configuration information of the enhanced dedicated physical control channel E-DPCCH;
and sending a configuration notification message to a micro cell node to enable the micro cell node to perform interference cancellation according to the interference cancellation request and the configuration notification message, wherein the configuration notification message is used for indicating an uplink configuration mode of the UE.
31. The method of claim 30, wherein the macro cell node sends an interference cancellation request to a micro cell node, comprising:
determining UE causing uplink interference to a micro cell;
and sending an interference elimination request comprising the uplink configuration information of the UE indicated by the determination result to the micro cell node.
32. The method according to claim 30 or 31, wherein when the UE of the macro cell is in an uplink configuration for pressing mode, the uplink configuration information of the UE specifically includes the uplink pressing mode configuration information;
the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE includes uplink stamper configuration, so that the micro cell node determines a sending time slot of an uplink signal of the UE according to the uplink stamper configuration information and the uplink stamper configuration indicated by the configuration notification message, and eliminates the uplink signal of the UE in the received uplink signal according to the sending time slot.
33. The method according to claim 30 or 31, wherein when the UE of the macro cell is in uplink MIMO or CLTD configuration, the uplink configuration information of the UE specifically includes the gain factor for calculating S-DPCCH;
the configuration notification message sent to the micro cell node indicates that the uplink configuration method of the UE comprises uplink MIMO or uplink CLTD configuration, so that the micro cell node demodulates a signal of the uplink S-DPCCH of the UE according to the gain factor for calculating the S-DPCCH and the uplink MIMO or uplink CLTD configuration indicated by the configuration notification message, and thus an uplink signal of the UE is obtained; and eliminating the uplink signal of the UE in the received uplink signal.
34. The method of claim 30, wherein before the macro cell node sends an interference cancellation request to a micro cell node, further comprising:
receiving an interference elimination indication sent by the micro cell node;
the macro cell node sends an interference cancellation request to the micro cell node, including:
the macro cell node sends an interference elimination request to the micro cell node according to the interference elimination indication; or,
before the macro cell node sends an interference cancellation request to the micro cell node, the method further includes:
receiving the uplink interference degree of the micro cell sent by the micro cell node;
the macro cell node sends an interference cancellation request to the micro cell node, including:
and the macro cell node sends an interference elimination request to the micro cell node when detecting that the uplink interference degree is higher than a predefined threshold.
35. The method of claim 34, wherein before the macro cell node sends an interference cancellation request to a micro cell node, further comprising:
receiving the capability information of interference cancellation sent by the micro cell node;
the macro cell node sends an interference cancellation request to the micro cell node, including:
and the macro cell node sends the interference elimination request to the micro cell node according to the capability information of the interference elimination.
36. The method of claim 34 or 35, wherein after the macro cell node sends the request for interference cancellation to the micro cell node, further comprising:
receiving an interference cancellation response sent by the micro cell node;
and performing operation of further eliminating interference according to the interference cancellation response.
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